fix(terminal): native terminal window flags

Fix for 2 issues:
- Native terminal window is not protected against resize (for example after C-W + = )
- Native terminal window is not protected against buffer change

Author: mbfoss

lua/claudecode/terminal/native.lua

@@ -81,6 +81,9 @@ local function open_terminal(cmd_string, env_table, effective_config, focus)
     vim.cmd("enew")
   end)
 
+  vim.wo[new_winid].winfixbuf = true
+  vim.wo[new_winid].winfixwidth = true
+
   -- Shell-aware split + leading-tilde expansion so quoted args and "~/..."
   -- paths survive, while no shell touches bracketed model aliases like
   -- "opus[1m]" (see utils.parse_command).
@@ -238,6 +241,9 @@ local function show_hidden_terminal(effective_config, focus)
   vim.api.nvim_win_set_buf(new_winid, bufnr)
   winid = new_winid
 
+  vim.wo[winid].winfixbuf = true
+  vim.wo[winid].winfixwidth = true
+
   if focus then
     -- Focus the terminal: switch to terminal window and enter insert mode
     vim.api.nvim_set_current_win(winid)